编译器错误消息：CS0118：'System.Configuration.ConfigurationManager.AppSettings'是'属性'但是像'方法'一样使用

Question

编译器错误消息：CS0118：＆＃39; System.Configuration.ConfigurationManager.AppSettings＆＃39;是一个属性＆＃39;但是像'＆＃39;

一样使用

<add key="ObjConn" value="Provider=SQLOLEDB;Persist Security Info=True;User ID=OMembers;PWD=OMembers;Initial Catalog=Db;Data Source=""/>

 strconnection = System.Configuration.ConfigurationManager.AppSettings("ObjConn");
          sqlcon = new SqlConnection(strconnection);

Answer 1

在C#中

执行此操作：

strconnection = System.Configuration.ConfigurationManager.AppSettings["ObjConn"];
sqlcon = new SqlConnection(strconnection);

Answer 2

我相信你在C＃工作？您需要使用索引运算符访问它：

strconnection = System.Configuration.ConfigurationManager.AppSettings["ObjConn"];

Answer 3

最好在连接字符串部分中定义连接字符串，如下所示：

<connectionStrings>
   <add 
      name="ObjConn" 
      connectionString="data source=.\SQLEXPRESS;Integrated Security=SSPI;AttachDBFilename=|DataDirectory|aspnetdb.mdf;User Instance=true" 
      providerName="System.Data.SqlClient"
   />
</connectionStrings>

并像这样实例化你的SqlConnection：

strconnection = System.Configuration.ConfigurationManager.ConnectionStrings["ObjConn"].ConnectionString;
sqlcon = new SqlConnection(strconnection);